/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package com.alibaba.citrus.maven.eclipse.base.eclipse.writers.wtp;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.Writer;

import com.alibaba.citrus.maven.eclipse.base.eclipse.Constants;
import com.alibaba.citrus.maven.eclipse.base.eclipse.EclipseSourceDir;
import com.alibaba.citrus.maven.eclipse.base.eclipse.Messages;
import com.alibaba.citrus.maven.eclipse.base.ide.IdeUtils;
import com.alibaba.citrus.maven.eclipse.base.ide.JeeUtils;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.plugin.MojoExecutionException;
import org.codehaus.plexus.util.IOUtil;
import org.codehaus.plexus.util.xml.PrettyPrintXMLWriter;
import org.codehaus.plexus.util.xml.XMLWriter;
import org.codehaus.plexus.util.xml.Xpp3Dom;

/**
 * Creates a .settings folder for Eclipse WTP 1.x release and writes out the configuration under it.
 *
 * @author <a href="mailto:rahul.thakur.xdev@gmail.com">Rahul Thakur</a>
 * @author <a href="mailto:fgiust@apache.org">Fabrizio Giustina</a>
 * @version $Id: EclipseWtpComponentWriter.java 1152335 2011-07-29 18:40:03Z rfscholte $
 */
public class EclipseWtpComponentWriter
        extends AbstractWtpResourceWriter {

    /** Context root attribute. */
    public static final String ATTR_CONTEXT_ROOT = "context-root"; //$NON-NLS-1$

    /** The .settings folder for Web Tools Project 1.x release. */
    public static final String DIR_WTP_SETTINGS = ".settings"; //$NON-NLS-1$

    /**
     * File name where the WTP component settings will be stored for our Eclipse Project.
     *
     * @return <code>.component</code>
     */
    protected String getComponentFileName() {
        return ".component"; //$NON-NLS-1$
    }

    /**
     * Version number added to component configuration.
     *
     * @return <code>1.0</code>
     */
    protected String getProjectVersion() {
        return null;
    }

    /** @see com.alibaba.citrus.maven.eclipse.base.eclipse.writers.EclipseWriter#write() */
    public void write()
            throws MojoExecutionException {

        // create a .settings directory (if not existing)
        File settingsDir = new File(config.getEclipseProjectDirectory(), DIR_WTP_SETTINGS);
        settingsDir.mkdirs();

        Writer w;
        try {
            w =
                    new OutputStreamWriter(new FileOutputStream(new File(settingsDir, getComponentFileName())),
                                           "UTF-8");
        } catch (IOException ex) {
            throw new MojoExecutionException(Messages.getString("EclipsePlugin.erroropeningfile"), ex); //$NON-NLS-1$
        }

        // create a .component file and write out to it
        XMLWriter writer = new PrettyPrintXMLWriter(w, "UTF-8", null);

        writeModuleTypeComponent(writer, config.getPackaging(), config.getBuildOutputDirectory(),
                                 config.getSourceDirs(), config.getLocalRepository());

        IOUtil.close(w);
    }

    /**
     * Writes out the module type settings for a Web Tools Project to a component file.
     *
     * @param writer
     * @param packaging
     * @param buildOutputDirectory
     * @param sourceDirs
     * @param localRepository
     * @throws MojoExecutionException
     */
    private void writeModuleTypeComponent(XMLWriter writer, String packaging, File buildOutputDirectory,
                                          EclipseSourceDir[] sourceDirs, ArtifactRepository localRepository)
            throws MojoExecutionException {
        writer.startElement(ELT_PROJECT_MODULES);
        writer.addAttribute(ATTR_MODULE_ID, "moduleCoreId"); //$NON-NLS-1$
        if (getProjectVersion() != null) {
            writer.addAttribute(ATTR_PROJECT_VERSION, getProjectVersion());
        }
        writer.startElement(ELT_WB_MODULE);

        // we should use the eclipse project name as the deploy name.
        writer.addAttribute(ATTR_DEPLOY_NAME, this.config.getEclipseProjectName());

        // deploy-path is "/" for utility and ejb projects, "/WEB-INF/classes" for webapps
        String target = "/"; //$NON-NLS-1$

        if (Constants.PROJECT_PACKAGING_WAR.equalsIgnoreCase(packaging)) //$NON-NLS-1$
        {
            target = "/WEB-INF/classes"; //$NON-NLS-1$

            File warSourceDirectory =
                    new File(IdeUtils.getPluginSetting(config.getProject(), JeeUtils.ARTIFACT_MAVEN_WAR_PLUGIN,
                                                       "warSourceDirectory", //$NON-NLS-1$
                                                       config.getProject().getBasedir() + "/src/main/webapp")); //$NON-NLS-1$

            writeContextRoot(writer);

            writer.startElement(ELT_WB_RESOURCE);
            writer.addAttribute(ATTR_DEPLOY_PATH, "/"); //$NON-NLS-1$
            writer.addAttribute(ATTR_SOURCE_PATH,
                                IdeUtils.toRelativeAndFixSeparator(config.getEclipseProjectDirectory(),
                                                                   warSourceDirectory, false));
            writer.endElement();

            // add web resources over the top of the war source directory
            Xpp3Dom[] webResources =
                    IdeUtils.getPluginConfigurationDom(config.getProject(), JeeUtils.ARTIFACT_MAVEN_WAR_PLUGIN,
                                                       new String[] { "webResources", "resource" });
            for (int index = 0; index < webResources.length; index++) {
                File webResourceDirectory = new File(webResources[index].getChild("directory").getValue());
                writer.startElement(ELT_WB_RESOURCE);
                writer.addAttribute(ATTR_DEPLOY_PATH, "/"); //$NON-NLS-1$
                writer.addAttribute(ATTR_SOURCE_PATH,
                                    IdeUtils.toRelativeAndFixSeparator(config.getEclipseProjectDirectory(),
                                                                       webResourceDirectory, false));
                writer.endElement();
            }

            // @todo is this really needed?
            writer.startElement(ELT_PROPERTY);
            writer.addAttribute(ATTR_NAME, "java-output-path"); //$NON-NLS-1$
            writer.addAttribute(ATTR_VALUE, "/" //$NON-NLS-1$
                                            + IdeUtils.toRelativeAndFixSeparator(config.getProject().getBasedir(),
                                                                                 buildOutputDirectory,
                                                                                 false));
            writer.endElement(); // property
        } else if (Constants.PROJECT_PACKAGING_EAR.equalsIgnoreCase(packaging)) //$NON-NLS-1$
        {

            String defaultApplicationXML =
                    config.getWtpapplicationxml() ? "/target/eclipseEar" : "/src/main/application";

            String earSourceDirectory =
                    IdeUtils.getPluginSetting(config.getProject(), JeeUtils.ARTIFACT_MAVEN_EAR_PLUGIN,
                                              "earSourceDirectory", //$NON-NLS-1$
                                              config.getProject().getBasedir() + defaultApplicationXML); //$NON-NLS-1$
            writer.startElement(ELT_WB_RESOURCE);
            writer.addAttribute(ATTR_DEPLOY_PATH, "/"); //$NON-NLS-1$
            writer.addAttribute(ATTR_SOURCE_PATH,
                                IdeUtils.toRelativeAndFixSeparator(config.getEclipseProjectDirectory(),
                                                                   new File(earSourceDirectory), false));
            writer.endElement();
        }

        if (Constants.PROJECT_PACKAGING_WAR.equalsIgnoreCase(packaging)
            || Constants.PROJECT_PACKAGING_EAR.equalsIgnoreCase(packaging)) //$NON-NLS-1$ //$NON-NLS-2$
        {
            // write out the dependencies.
            writeWarOrEarResources(writer, config.getProject(), localRepository);
        }

        for (int j = 0; j < sourceDirs.length; j++) {
            EclipseSourceDir dir = sourceDirs[j];
            // test src/resources are not added to wtpmodules
            if (!dir.isTest()) {
                // <wb-resource deploy-path="/" source-path="/src/java" />
                writer.startElement(ELT_WB_RESOURCE);
                writer.addAttribute(ATTR_DEPLOY_PATH, target);
                writer.addAttribute(ATTR_SOURCE_PATH, dir.getPath());
                writer.endElement();
            }
        }

        writer.endElement(); // wb-module
        writer.endElement(); // project-modules
    }

    /** @param writer  */
    protected void writeContextRoot(XMLWriter writer) {
        writer.startElement(ELT_PROPERTY);
        writer.addAttribute(ATTR_CONTEXT_ROOT, config.getContextName());
        writer.endElement(); // property
    }
}
